I have been thinking about Erenville a lot and how the narrative allows us to really get to know him through the quiet moments. Through action rather than spoken words.
His mother calls him a fussy little bunbun, which is funny to begin with as we know him so far to be a taciturn and practical man. But while we travel with him we discover that he has suffered abandonment all throughout his life; first by his mother leaving him in care of others as she traveled herself, then by sending him away on his own travels, then further upon his return when there is a literal screen between them. The symbolism here is unmistakable.
Then, as we progress, it becomes quite clear that Erenville suspects that there’s something wrong with his mother. Instantly he’s on the defensive, citing that her whimsy and overwhelming personality always overshadow his own wishes, and that he struggles to understand her, also to trust her. His quiet stoicism isn’t that funny anymore.
In an ironic twist we discover that she has left him one last time, to the land of Living Memory. Even if it was never her intention to leave him in such a way, it must be hard to overcome that sense of continuous abandonment - and this time he has to say goodbye forever. That he draws away from everyone else to grieve and come to terms with this in solitude speaks volumes. It really indicates that he dealt with difficult emotions alone a lot while growing up, and in such a way he never learned how to rely on others. In the end, when finally pressed to the breaking point, Erenville lashes out in anger as the tools he made for himself fails him in processing all of his grief and fear alone. He has to find the courage to trust his mother with his emotions and that just as she's leaving him one last time.
Wuk Lamat is always right there in your face going through her emotions and leaning upon others for support, on the other side is Erenville, who draws back with his pain. We learn to know him just as deeply as Wuk Lamat, but through everything that isn’t said, rather than what is said. In fear of sounding effusive, even their appearance symbolises this: they're golden dawn and darkening dusk. Two sides of the same coin.
Honestly, personally to me, Erenville is one of the best written characters in this story so far. I love him deeply. I cried so hard for him.
PS. His love for his mother becomes so clear in the love he pours into the fauna that she mentored him in. While working as a gleaner, he's probably as close to her as he can be when she's physically not there. In the moments we see him care for animals his entire countenance changes, he becomes soft and caring, even exuberant and joyful.